AC / DC dual-input system power supply

By designing an AC/DC dual-input system power supply with integrated DC/AC input interface and internal circuit module, the problem that the existing system power supply cannot meet both AC and DC input requirements is solved, equipment space is saved and costs are reduced, and electromagnetic wave protection function is provided.

CN223488096UActive Publication Date: 2025-10-28CHANGZHOU WUJIN HGPOWER
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Patent Information

Application Number
CN202422912443.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-27
Publication Date
2025-10-28
Estimated Expiration
2034-11-27

AI Technical Summary

Technical Problem

The existing system power supply cannot meet the requirements of both AC and DC input, resulting in large equipment size, complex wiring and high cost.

Method used

Design an AC/DC dual-input system power supply that integrates a DC input interface, AC input interface, DC output port, and internal circuit modules, including input filter circuit, DC/DC module, ideal diode, AC/DC power supply, output control switch, MCU, power supply circuit, and control module to achieve the integration of AC and DC inputs.

Benefits of technology

It realizes the integration of AC and DC input, saves equipment installation space, reduces costs, and uses conductive rubber strips to prevent electromagnetic wave leakage, making it suitable for compact 2U chassis design.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of system power supplies, in particular to an AC / DC dual-input system power supply, which comprises a shell, a side cover, a DC input interface, an AC input interface and a DC output port, the DC input interface and the AC input interface are arranged on the side cover, the DC output port is arranged at the right end of the shell, and the AC input interface is arranged at the right end of the shell. Comprising an input filter circuit, a DC / DC module, an ideal diode, an AC / DC power supply, an output control switch, an MCU, a power supply circuit, a mode selection module and an enabling control module, the input filter circuit, the DC / DC module, the ideal diode, the AC / DC power supply, the output control switch, the MCU and the power supply circuit are arranged in a shell, and the mode selection module and the enabling control module are integrated in a DC output port. The ideal diode is respectively connected with the output control switch and the power supply circuit, the MCU is respectively connected with the output control switch, the power supply circuit, the mode selection module and the enabling control module, and the output control switch is connected to a DC output port; the utility model integrates alternating current and direct current inputs, and has the function of preventing electromagnetic wave leakage.
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Description

Technical Field

[0001] This utility model relates to the field of system power supply technology, and in particular to an AC / DC dual-input system power supply. Background Technology

[0002] Currently, most system power supplies on the market are either independent AC input / DC output or DC input / DC output, and none simultaneously support both AC and DC input / DC output. In some specialized industry applications, simultaneous AC and DC power supply is required to provide system redundancy. Using separate AC and DC power supplies would result in a large overall power supply size, wasting space, and requiring separate sets of wiring for both input and output, making installation and wiring cumbersome. Some systems on the market also use various adapters to convert AC to DC input, but this is costly and can disrupt the normal operation of the equipment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a system power supply with a simple structural design, integrated AC and DC inputs, and electromagnetic wave leakage prevention function.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an AC / DC dual-input system power supply, including a housing, a side cover, a DC input interface, an AC input interface, and a DC output port. The housing is a hollow structure with an opening at the left end. The side cover seals and closes the opening of the housing. The DC input interface and the AC input interface are mounted on the side cover. The DC output port is mounted at the right end of the housing. It also includes an input filter circuit, a DC / DC module, an ideal diode, an AC / DC power supply, an output control switch, an MCU, a power supply circuit, and a mode selection module and an enable control module integrated in the DC output port. The DC input interface is connected to the ideal diode in sequence through the input filter circuit and the DC / DC module. The AC input interface is connected to the ideal diode through the AC / DC power supply. The ideal diode is connected to the output control switch and the power supply circuit respectively. The MCU is connected to the output control switch, the power supply circuit, the mode selection module, and the enable control module respectively. The output control switch is connected to the DC output port.

[0005] Furthermore, the DC output port is provided with a first DC output interface and a second DC output interface. The output control switch is directly connected to the first DC output interface, and the output control switch is connected to the second DC output interface through a DC / DC circuit.

[0006] Further, the input filtering circuit includes common-mode inductors LF1 and LF4, and capacitors C1, C22, C32, and C33. Pin 1 of the common-mode inductor LF1 is connected to one end of capacitor C1 and the negative terminal of the DC input interface, and pin 2 is connected to the other end of capacitor C1 and the positive terminal of the DC input interface. Capacitor C22 is connected in parallel with capacitor C1. Pin 3 of the common-mode inductor LF1 is connected to one end of capacitor C33 and pin 1 of the common-mode inductor LF4, and pin 4 is connected to the other end of capacitor C33 and pin 2 of the common-mode inductor LF4. Pin 3 of the common-mode inductor LF4 is connected to one end of capacitor C32 and the DC / DC module, and pin 4 is connected to the other end of capacitor C32 and the DC / DC module.

[0007] Furthermore, the ideal diode includes a chip U3, a transistor Q1, a capacitor C45, and a resistor R22. Pin 4 of the chip U3 is connected to the source of the transistor Q1 and the DC / DC module, and pin 5 is connected to the gate of the transistor Q1. Pin 6 of the chip U3 is connected to the drain of the transistor Q1 and one end of the resistor R22, and pin 1 is connected to one end of the capacitor C45 and the other end of the resistor R22. The other end of the capacitor C45 is connected to pin 2 of the chip U3.

[0008] Furthermore, the output control switch includes a drive optocoupler Q3, a power supply P2, a transistor Q5, a diode D12, a capacitor C54, and resistors R29 and R30. Pin 1 of the drive optocoupler Q3 is connected to the MCU and one end of the diode D12, and pin 2 is connected to the other end of the diode D12. Pin 4 of the drive optocoupler Q3 is connected to one end of the capacitor C54, the socket 4 of the power supply P2, and the drain of the transistor Q5, and pin 5 is connected to the gate of the transistor Q5 through resistor R30. The other end of the capacitor C54 is connected to pin 6 of the drive optocoupler Q3 and the socket 2 of the power supply P2. One end of the resistor R29 is connected to the common terminal of the transistor Q5 and the resistor R30, and the other end is connected to the common terminal of the drive optocoupler Q3 and the transistor Q5. The source of the transistor Q5 is connected to an ideal diode and an AC / DC power supply.

[0009] Furthermore, the power supply circuit includes a chip U1, a diode D1, capacitors C28 and C29, and a resistor R8. Pin 1 of the chip U1 is grounded through diode D1 and capacitor C28, and pin 3 is grounded through capacitor C29. One end of the resistor R8 is connected to pin 1 of the chip U1, and the other end is connected to an ideal diode. Pin 3 of the chip U1 is connected to the MCU.

[0010] Furthermore, the mode selection module includes diodes D15 and D16 and resistor R24. One end of diode D16 is connected to the MCU through diode D15, and the other end is grounded. One end of resistor R24 ​​is connected to the MCU, and the other end is connected to +5V.

[0011] Furthermore, the enable control module includes diodes D3 and D4, and resistor R21. One end of diode D4 is connected to the MCU through diode D3, and the other end of diode D4 is grounded. One end of resistor R21 is connected to the MCU, and the other end of resistor R21 is connected to +5V.

[0012] Further, the DC / DC circuit includes a chip U7, an inductor L4, capacitors C47, C48, C49, C50, C51, C55, C56, C57, and resistors R25, R26, R27, and R28. Pin 1 of the chip U7 is connected to the second DC output interface through the inductor L4, and pin 2 is connected to pin 1 of the chip U7 through resistor R25 and capacitor C47. The common terminal of the inductor L4 and the second DC output interface is grounded through capacitors C55, C56, and C57, respectively. Pin 4 of the chip U7 is connected to the common terminal of the inductor L4 and the second DC output interface through resistor R27 and capacitor C51, respectively. Pin 4 of the chip U7 is grounded through resistor R28, and pin 3 is grounded through capacitor C50. Pin 5 of the chip U7 is connected to pin 7 of the chip U7 through resistor R26, and pin 7 is grounded through capacitors C48 and C49, respectively. Pin 7 of the chip U7 is connected to an output control switch.

[0013] Furthermore, a conductive adhesive strip is provided between the housing and the side cover.

[0014] The beneficial effects of the utility model are:

[0015] (1) This utility model, through the coordinated setup of input filtering circuit, DC / DC module, ideal diode, AC / DC power supply, output control switch, MCU, power supply circuit, mode selection module and enable control module, enables the system power supply to have two inputs: AC 100-264V and DC 20-36V. The AC and DC inputs are integrated into one unit, saving equipment installation space, eliminating the need for a separate adapter, reducing costs, and ensuring normal use of terminal equipment.

[0016] (2) This utility model achieves sealing treatment at the connection between the housing and the side cover by setting a conductive adhesive strip between the housing and the side cover, preventing electromagnetic waves from being exposed and facilitating various electromagnetic interference tests.

[0017] (3) The present invention has a compact structure and high power density, and is suitable for system power supplies with 2U chassis. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the DC output port in this utility model;

[0021] Figure 3 This is a schematic diagram of the control board in this utility model;

[0022] Figure 4 This is the circuit diagram of this utility model;

[0023] Figure 5 This is the circuit schematic diagram of this utility model;

[0024] Figure 6 This is the circuit schematic diagram of the DC / DC circuit in this utility model.

[0025] In the diagram: 1. Housing; 2. Side cover; 3. DC input interface; 4. AC input interface; 5. DC output port; 6. Input filter circuit; 7. DC / DC module; 8. Ideal diode; 9. AC / DC power supply; 10. Output control switch; 11. MCU; 12. Power supply circuit; 13. Mode selection module; 14. Enable control module; 15. DC / DC circuit; 16. Filter board; 17. Module board; 18. Power board; 19. Control board; 20. Handle. Detailed Implementation

[0026] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] like Figure 1 , Figure 2 and Figure 4As shown, an AC / DC dual-input system power supply includes a housing 1, a side cover 2, a DC input interface 3, an AC input interface 4, and a DC output port 5. The housing 1 is a hollow structure with an opening at the left end. The side cover 2 seals and covers the opening of the housing 1. The DC input interface 3 and the AC input interface 4 are mounted on the side cover 2. The DC output port 5 is mounted at the right end of the housing 1. The system also includes an input filter circuit 6, a DC / DC module 7, an ideal diode 8, an AC / DC power supply 9, an output control switch 10, an MCU 11, a power supply circuit 12, and a mode selection module 13 and an enable control module 14 integrated in the DC output port 5. The DC input interface 3 is connected to the ideal diode 8 through the input filter circuit 6 and the DC / DC module 7 in sequence. The AC input interface 4 is connected to the ideal diode 8 through the AC / DC power supply 9. The ideal diode 8 is connected to the output control switch 10 and the power supply circuit 12 respectively. The MCU 11 is connected to the output control switch 10, the power supply circuit 12, the mode selection module 13, and the enable control module 14 respectively. The output control switch 10 is connected to the DC output port 5. Through the coordinated design of the input filter circuit 6, DC / DC module 7, ideal diode 8, AC / DC power supply 9, output control switch 10, MCU 11, power supply circuit 12, mode selection module 13, and enable control module 14, the system power supply has both AC 100-264V and DC 20-36V inputs. The AC and DC inputs are integrated into a single unit, saving installation space, eliminating the need for separate adapters, reducing costs, and ensuring normal operation of terminal equipment. Internally, the system power supply connects two sets of outputs in parallel, with only one output interface, simplifying installation and wiring.

[0028] Specifically, such as Figure 2 and Figure 3 As shown, DC output port 5 has a first DC output interface and a second DC output interface. Output control switch 10 is directly connected to the first DC output interface, which outputs 12V voltage. Output control switch 10 is connected to the second DC output interface through DC / DC circuit 15, which outputs 3.3V voltage. AC / DC power supply 9 is connected to AC input interface 4 through fuse F2. Input filter circuit 6 is integrated on filter board 16. DC / DC module 7 and ideal diode 8 are integrated on module board 17. DC / DC module 7 has a power of 300W, AC input of 100-264V, and DC output of 12V / 25A. AC / DC power supply 9 is installed on power board 18. AC / DC power supply 9 has a power of 350W, DC input of 20-40V, and DC output of 12V / 30A. Output control switch 10, MCU 11, power supply circuit 12 and DC / DC circuit 15 are integrated on control board 19. A handle 20 is installed on the top of side cover 2 for easy installation and operation of system power supply.

[0029] The system power supply is 78mm high and only 120mm deep, featuring a compact design suitable for 2U chassis. During operation, the system power supply can deliver a peak output of up to 750W.

[0030] like Figure 5 As shown, the input filter circuit 6 includes common-mode inductors LF1 and LF4, and capacitors C1, C22, C32, and C33. Pin 1 of common-mode inductor LF1 is connected to one end of capacitor C1 and the negative terminal of DC input interface 3, while pin 2 is connected to the other end of capacitor C1 and the positive terminal of DC input interface 3. Capacitor C22 is connected in parallel with capacitor C1. Pin 3 of common-mode inductor LF1 is connected to one end of capacitor C33 and pin 1 of common-mode inductor LF4, while pin 4 is connected to the other end of capacitor C33 and pin 2 of common-mode inductor LF4. Pin 3 of common-mode inductor LF4 is connected to one end of capacitor C32 and DC / DC module 7, while pin 4 is connected to the other end of capacitor C32 and DC / DC module 7. The input filter circuit 6 filters out common-mode and differential-mode interference, reducing conducted and radiated interference to surrounding equipment and power supply devices during power supply operation. Specifically, pin 2 of common-mode inductor LF1 is connected to the positive terminal of DC input interface 3 via fuse F1.

[0031] like Figure 5 As shown, the ideal diode 8 includes a chip U3, a transistor Q1, a capacitor C45, and a resistor R22. Pin 4 of chip U3 is connected to the source of transistor Q1 and the DC / DC module 7, respectively, and pin 5 is connected to the gate of transistor Q1. Pin 6 of chip U3 is connected to the drain of transistor Q1 and one end of resistor R22, respectively, and pin 1 is connected to one end of capacitor C45 and the other end of resistor R22. The other end of capacitor C45 is connected to pin 2 of chip U3. The ideal diode 8 allows current to flow unidirectionally from the positive to the negative terminal with relatively small voltage drop loss.

[0032] like Figure 5 As shown, the output control switch 10 includes a drive optocoupler Q3, a power supply P2, a transistor Q5, a diode D12, a capacitor C54, and resistors R29 and R30. Pin 1 of the drive optocoupler Q3 is connected to one end of the MCU 11 and one end of the diode D12, and pin 2 is connected to the other end of the diode D12. Pin 4 of the drive optocoupler Q3 is connected to one end of the capacitor C54, the socket 4 of the power supply P2, and the drain of the transistor Q5, and pin 5 is connected to the gate of the transistor Q5 through resistor R30. The other end of the capacitor C54 is connected to pin 6 of the drive optocoupler Q3 and the socket 2 of the power supply P2. One end of the resistor R29 is connected to the common terminal of the transistor Q5 and the resistor R30, and the other end is connected to the common terminal of the drive optocoupler Q3 and the transistor Q5. The source of the transistor Q5 is connected to the ideal diode 8 and the AC / DC power supply 9.

[0033] like Figure 5 As shown, the power supply circuit 12 includes chip U1, diode D1, capacitors C28 and C29, and resistor R8. Pin 1 of chip U1 is grounded through diode D1 and capacitor C28, and pin 3 is grounded through capacitor C29. One end of resistor R8 is connected to pin 1 of chip U1, and the other end is connected to ideal diode 8. Pin 3 of chip U1 is connected to MCU 11.

[0034] like Figure 5 As shown, the mode selection module 13 includes diodes D15 and D16 and resistor R24. One end of diode D16 is connected to MCU 11 through diode D15, and the other end is grounded. One end of resistor R24 ​​is connected to MCU 11, and the other end is connected to +5V.

[0035] like Figure 5 As shown, the enable control module 14 includes diodes D3 and D4, and resistor R21. One end of diode D4 is connected to MCU 11 through diode D3, and the other end is grounded. One end of resistor R21 is connected to MCU 11, and the other end is connected to +5V. The enable control module 14 can be configured to turn its output on and off via an external enable signal.

[0036] like Figure 6 As shown, the DC / DC circuit 15 includes a chip U7, an inductor L4, capacitors C47, C48, C49, C50, C51, C55, C56, C57, and resistors R25, R26, R27, and R28. Pin 1 of chip U7 is connected to the second DC output interface through inductor L4, and pin 2 is connected to pin 1 of chip U7 through resistor R25 and capacitor C47. The common terminal of inductor L4 and the second DC output interface is grounded through capacitors C55, C56, and C57, respectively. Pin 4 of chip U7 is connected to the common terminal of inductor L4 and the second DC output interface through resistor R27 and capacitor C51, respectively. Pin 4 of chip U7 is grounded through resistor R28, and pin 3 is grounded through capacitor C50. Pin 5 of chip U7 is connected to pin 7 of chip U7 through resistor R26, and pin 7 is grounded through capacitors C48 and C49, respectively. Pin 7 of chip U7 is connected to the output control switch 10.

[0037] A conductive adhesive strip is provided between the housing 1 and the side cover 2 to achieve a sealing treatment at the connection between the housing 1 and the side cover 2, prevent electromagnetic waves from being exposed, and facilitate passing various electromagnetic interference tests.

[0038] The DC input passes through the input filter circuit 6 to filter out common-mode and differential-mode interference. Then, the DC / DC module 7 converts the wide-range DC input voltage into the DC stable voltage required by the device. The DC input is isolated by the ideal diode 8 and connected in parallel to the output terminal of the AC / DC power supply 9 with the same output DC voltage to provide system redundancy. Finally, the MCU 11 controls the output control switch 10 to achieve the output voltage following the enable control signal to turn on or off.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A dual-input AC / DC power supply, comprising a housing (1), a side cover (2), a DC input interface (3), an AC input interface (4), and a DC output port (5), wherein the housing (1) is a hollow structure with an opening at the left end, the side cover (2) seals and covers the opening of the housing (1), the DC input interface (3) and the AC input interface (4) are mounted on the side cover (2), and the DC output port (5) is mounted at the right end of the housing (1), characterized in that: It also includes an input filter circuit (6), a DC / DC module (7), an ideal diode (8), an AC / DC power supply (9), an output control switch (10), an MCU (11), a power supply circuit (12), and a mode selection module (13) and an enable control module (14) integrated in the DC output port (5). The DC input interface (3) is connected to the ideal diode (8) through the input filter circuit (6) and the DC / DC module (7) in sequence. The AC input interface (4) is connected to the ideal diode (8) through the AC / DC power supply (9). The ideal diode (8) is connected to the output control switch (10) and the power supply circuit (12) respectively. The MCU (11) is connected to the output control switch (10), the power supply circuit (12), the mode selection module (13), and the enable control module (14) respectively. The output control switch (10) is connected to the DC output port (5).

2. The AC / DC dual-input system power supply according to claim 1, characterized in that: The DC output port (5) is provided with a first DC output interface and a second DC output interface. The output control switch (10) is directly connected to the first DC output interface and the output control switch (10) is connected to the second DC output interface through a DC / DC circuit (15).

3. The AC / DC dual-input system power supply according to claim 1, characterized in that: The input filter circuit (6) includes common-mode inductors LF1 and LF4, and capacitors C1, C22, C32, and C33. Pin 1 of the common-mode inductor LF1 is connected to one end of capacitor C1 and the negative terminal of the DC input interface (3), and pin 2 is connected to the other end of capacitor C1 and the positive terminal of the DC input interface (3). Capacitor C22 is connected in parallel with capacitor C1. Pin 3 of the common-mode inductor LF1 is connected to one end of capacitor C33 and pin 1 of common-mode inductor LF4, and pin 4 is connected to the other end of capacitor C33 and pin 2 of common-mode inductor LF4. Pin 3 of the common-mode inductor LF4 is connected to one end of capacitor C32 and the DC / DC module (7), and pin 4 is connected to the other end of capacitor C32 and the DC / DC module (7).

4. The AC / DC dual-input system power supply according to claim 1, characterized in that: The ideal diode (8) includes a chip U3, a transistor Q1, a capacitor C45, and a resistor R22. Pin 4 of the chip U3 is connected to the source of the transistor Q1 and the DC / DC module (7) respectively, and pin 5 is connected to the gate of the transistor Q1. Pin 6 of the chip U3 is connected to the drain of the transistor Q1 and one end of the resistor R22 respectively, and pin 1 is connected to one end of the capacitor C45 and the other end of the resistor R22 respectively. The other end of the capacitor C45 is connected to pin 2 of the chip U3.

5. The AC / DC dual-input system power supply according to claim 1, characterized in that: The output control switch (10) includes a drive optocoupler Q3, a power supply P2, a transistor Q5, a diode D12, a capacitor C54, and resistors R29 and R30. Pin 1 of the drive optocoupler Q3 is connected to one end of the MCU (11) and one end of the diode D12, and pin 2 is connected to the other end of the diode D12. Pin 4 of the drive optocoupler Q3 is connected to one end of the capacitor C54, the socket 4 of the power supply P2, and the drain of the transistor Q5, and pin 5 is connected to the gate of the transistor Q5 through resistor R30. The other end of the capacitor C54 is connected to pin 6 of the drive optocoupler Q3 and the socket 2 of the power supply P2. One end of the resistor R29 is connected to the common terminal of the transistor Q5 and the resistor R30, and the other end is connected to the common terminal of the drive optocoupler Q3 and the transistor Q5. The source of the transistor Q5 is connected to an ideal diode (8) and an AC / DC power supply (9).

6. The AC / DC dual-input system power supply according to claim 1, characterized in that: The power supply circuit (12) includes chip U1, diode D1, capacitors C28 and C29, and resistor R8. Pin 1 of chip U1 is grounded through diode D1 and capacitor C28, and pin 3 is grounded through capacitor C29. One end of resistor R8 is connected to pin 1 of chip U1, and the other end is connected to ideal diode (8). Pin 3 of chip U1 is connected to MCU (11).

7. The AC / DC dual-input system power supply according to claim 1, characterized in that: The mode selection module (13) includes diodes D15 and D16 and resistor R24. One end of diode D16 is connected to MCU (11) through diode D15, and the other end is grounded. One end of resistor R24 ​​is connected to MCU (11), and the other end is connected to +5V.

8. The AC / DC dual-input system power supply according to claim 1, characterized in that: The enable control module (14) includes diodes D3 and D4 and resistor R21. One end of diode D4 is connected to MCU (11) through diode D3, and the other end is grounded. One end of resistor R21 is connected to MCU (11), and the other end is connected to +5V.

9. The AC / DC dual-input system power supply according to claim 2, characterized in that: The DC / DC circuit (15) includes a chip U7, an inductor L4, capacitors C47, C48, C49, C50, C51, C55, C56, C57, and resistors R25, R26, R27, and R28. Pin 1 of the chip U7 is connected to the second DC output interface through the inductor L4, and pin 2 is connected to pin 1 of the chip U7 through resistor R25 and capacitor C47. The common terminal of the inductor L4 and the second DC output interface is grounded through capacitors C55, C56, and C57, respectively. Pin 4 of the chip U7 is connected to the common terminal of the inductor L4 and the second DC output interface through resistor R27 and capacitor C51, respectively. Pin 4 of the chip U7 is grounded through resistor R28, and pin 3 is grounded through capacitor C50. Pin 5 of the chip U7 is connected to pin 7 of the chip U7 through resistor R26, and pin 7 is grounded through capacitors C48 and C49, respectively. Pin 7 of the chip U7 is connected to the output control switch (10).

10. The AC / DC dual-input system power supply according to claim 1, characterized in that: A conductive adhesive strip is provided between the housing (1) and the side cover (2).